what does it mean they have one one additional/final markdown? on some of the items they had a tab that said reduced futher so does this mean it might go down even more?

tips : should i wait till they do that?
ps. around when does that happen?

In the second round of mark-downs, some items that were already in the sale are "further reduced" and new items are added to the sale.

In the third round of mark-downs (the final reductions), any sale items may be further reduced (whether they have been reduced before or not), although no new items will be added to the sale.

Final reductions usually occur around two weeks after second round of mark-downs. You could wait to see if the final reductions apply to the things you want, but it's a risk to wait that long as the items could very easily sell out. You could put the items on your wishlist and if they don't say "low stock" you might try waiting until the final reductions.

The email NAP sent out today said "Final Sale Reductions" but it looks like nothing has been reduced further yet! If NAP goes by the past few sales, an extra 20% off should happen around this Monday. I'm also waiting for a few things to get one final price chop.